chore: apply cargo fmt across workspace and update docs

- Run cargo fmt on all Rust crates for consistent formatting
- Update CLAUDE.md with WASM plugin commands and dev.ps1 instructions
- Update wiki: add WASM plugin architecture, rewrite dev environment docs
- Minor frontend cleanup (unused imports)

apps/web/src/layouts/MainLayout.tsx

@@ -82,7 +82,7 @@ const SidebarMenuItem = memo(function SidebarMenuItem({
 export default function MainLayout({ children }: { children: React.ReactNode }) {
   const { sidebarCollapsed, toggleSidebar, theme: themeMode, setTheme } = useAppStore();
   const { user, logout } = useAuthStore();
-  const { token } = theme.useToken();
+  theme.useToken();
   const navigate = useNavigate();
   const location = useLocation();
   const currentPath = location.pathname || '/';